Hi,
You can potentially extend the css thanks to this code:
.hikashop_checkout_page_step2 input, .hikashop_checkout_page_step2 select, .hikashop_checkout_page_step2 textarea{
-webkit-user-select: none !important;
-moz-user-select: none !important;
-ms-user-select: none !important;
-o-user-select: none !important;
user-select: none !important;
border: 0 !important;
outline: none !important;
pointer-events: none;
cursor: default;
}
I have not tested it and it is possible that some elements will be missing, but thanks to an internet search you should be able to find the missing properties.
Else, the view "checkout / fields" can be edited.